<?php
/**
 * User: lie
 * Date: 2020-11-07 18:02
 * description: 验证码实例, 包含两个文件yzm_1、yzm_2
 */
    switch ($_GET['link']){
        case "文字":
?>
        <img src="yzm_1.php">
<?php
            break;
        case "数字":
?>
        <img src="yzm_2.php">
<?php
            break;
        default:

?>
        <img src="yzm_2.php">
<?php
    }
?>

